Finding the Fourth Proportional to 108.32, 162.55 and 43.31

Step by Step Solution

1. Step 1: Write the proportion equation
   108.32 : 162.55 = 43.31 : x
2. Step 2: Convert to fraction form
   108.32/162.55 = 43.31/x
3. Step 3: Cross multiply
   108.32x = 162.55 × 43.31
4. Step 4: Simplify right side
   108.32x = 7,040.04
5. Step 5: Solve for x
   x = 7,040.04/108.32
6. Step 6: Final answer
   x = 64.99